ASP. NET learning notes (5) Delegation

Instance:
I. Use of delegation
1. Declare a delegate
2. Pass the delegate as a parameter
3. Call the corresponding method based on the input delegate

 

Ii. Delegation Summary
1. The delegate only contains the method address.
2. Avoid using a large number of conditional statements and make the program more scalable.

Iii. multicast Delegation

1. The status of the delegate as a parameter is the same as that of string, so it can be declared as follows

2. Delegation is different from a string feature: multiple methods can be assigned to the same delegate, which is both a multicast delegate.
When this delegate is called, the bound methods are called in sequence.

3. Use "=" for the first time and "+ =" for the second time.

4. Similarly, You can unbind a delegate.

 
By: dxh_0829